\dv Code language: SQL (Structured Query Language) ( sql ) 9) List users and their roles To list available views in the current database, you use the \dv command. \df Code language: SQL (Structured Query Language) ( sql ) 8) List available views To list available functions in the current database, you use the \df command. \dn Code language: SQL (Structured Query Language) ( sql ) 7) List available functions To list all schemas of the currently connected database, you use the \dn command. To describe a table such as a column, type, modifiers of columns, etc., you use the following command: \d table_name Code language: SQL (Structured Query Language) ( sql ) 6) List available schema Note that this command shows the only table in the currently connected database. To list all tables in the current database, you use \dt command: \dt Code language: SQL (Structured Query Language) ( sql ) To list all databases in the current PostgreSQL database server, you use \l command: \l Code language: SQL (Structured Query Language) ( sql ) 4) List available tables You are now connected to database "dvdrental" as user "postgres".ĭvdrental= # Code language: PHP ( php ) 3) List available databases The following command connects to dvdrental database under postgres user: postgres= # \c dvdrental If you omit the user parameter, the current user is assumed. Once you are connected to a database, you can switch the connection to a new database under a user specified by user. In case you want to use SSL mode for the connection, just specify it as shown in the following command: psql -U user -h host "dbname=db sslmode=require" Code language: SQL (Structured Query Language) ( sql ) 2) Switch connection to a new database If you want to connect to a database that resides on another host, you add the -h option as follows: psql -h host -d database -U user -W Code language: SQL (Structured Query Language) ( sql ) psql -d database -U user -WĬode language: SQL (Structured Query Language) ( sql )įor example, to connect to dvdrental database under postgres user, you use the following command: C:\Program Files\PostgreSQL\9.5\bin>psql -d dvdrental -U postgres -Wĭvdrental= # Code language: SQL (Structured Query Language) ( sql ) After pressing Enter PostgreSQL will ask for the password of the user. The following command connects to a database under a specific user. Generating other formats than markdown or customize this output.Summary: in this tutorial, we give you a list of common psql commands that help you query data from the PostgreSQL database server faster and more effectively. Writing this in languages like Ruby or Python would probably be UTF-8 CSV into the markdown format as used by github, and meant to produce Here’s for instance a Perl csv-to-markdown program that transforms Have full parsers for it ready to be used, thanks to the ubiquity of CSV. Simple to write because most popular languages To that effect, a csv-to-another-format filtering script can be placedįor the part meant to read CSV, the script will often be CSV as an intermediate formatĬSV can also be used as a proxy to another format that psql It unambiguously, including for multi-line fields. Separator, or a linefeed, or a double quote (in the latter case anyĭouble quote inside the field is doubled).ĬSV-compliant readers can read that content back and restore Requires to add double quotes around any field that contains the There’s no way to distinguish a line feed within a field from a record when line feeds are present inside fields (in multi-line text),.when the separator appears inside the data, there’s no way.With the “unaligned” format with its field separator given by the When the result is produced by a meta-command instead of a query:ĬSV as a replacement for the unaligned format (-A)Īside from \copy, simple exports in tabular format are often done When data must be fetched through a query that is not supported by COPY,įor instance a cursor, since fetch from c is valid butĬopy (fetch from c) to stdout csv is not. In practice, we need to use an output format instead of It can also be opted for on the command line with the -csv option. Results can output them in the CSV format. Issue \pset format csv, so that all commands producing tabular ) TO STDOUT CSV as an SQLĬommand, or with the \copy meta-command in psql, which invokesĬOPY under the hood and handles the flow of data on the client side.īut there are still a few cases not covered by this functionality,ĬSV has been added to the output formats. Exporting query results in CSV has been possible for a long timeĬOPY (SELECT.
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